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[Bug 1293384] Re: Compiz CPU usage dramatically increased in Ubuntu 14.04

To: compiz@xxxxxxxxxxxxxxxxxxx
From: Laurent Gauthier <mr.l.gauthier@xxxxxxxxx>
Date: Thu, 06 Aug 2015 08:49:03 -0000
Reply-to: Bug 1293384 <1293384@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

This issue has been killing the battery of my laptop with 15.04 install.

Not only is compiz using way more CPU than it should, but it also
causing Xorg to undergo a lot of activity totalling more than 100% of a
CPU core on my Core i5 laptop. Needless to say that battery life was
disastrous.

Now after a little time spent researching this I found a work-around
that appears to work:

1. Install the "Compiz config settings manager"
2. Under the OpenGL section in this settings manager, uncheck the "Sync to VBlank" option
3. Log out
4. Log in

And the problem appears to be gone.

After being over 60% CPU at all times compiz is now consistently under
1% CPU. The same goes for Xorg.

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https://bugs.launchpad.net/bugs/1293384

Title:
  Compiz CPU usage dramatically increased in Ubuntu 14.04

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